docs: def _get_lutfiles_version(self):
          """Check the version of the atm correction luts from the version file in the
             specific aerosol correction directory
  
          """
          basedir = RAYLEIGH_LUT_DIRS[self._aerosol_type]
          lutfiles_version_path = os.path.join(basedir,
                                               ATM_CORRECTION_LUT_VERSION[self._aerosol_type]['filename'])
  
          if not os.path.exists(lutfiles_version_path):
              return "v0.0.0"
  
          with open(lutfiles_version_path, 'r') as fpt:
              # Get the version from the file
              return fpt.readline().strip()